DTI, which has a lower resolution than other forms of MRI, supposedly maps the paths axons take in white matter and show the physical connectivity of the brain.

Are these Voxels overlapping to any extent to artificially make higher resolutions? Or is there something I'm missing.

There's a fine line between mapping where white matter is and mapping the individual connections and directions within. I'm having trouble wrapping my head around that, I know that DTI can read for diffusion resistance and thus directionality, but that would seem to require a higher resolution given the complexity of the white matter tracts.